Dalla Corte, A. P., Ângela M. Klein Hentz, B. Doubrawa, and C. R. Sanquetta. “Environmental Fragility of Iguaçu River Watershed, Paraná, Brazil”. Revista Bosque, vol. 36, no. 2, May 2017, pp. 287-9, https://revistabosque.org/index.php/bosque/article/view/538.